Catechism of the Catholic Church §2831 — excerpt
But the presence of those who hunger because they lack bread opens up another profound meaning of this petition. the drama of hunger in the world calls Christians who pray sincerely to exercise responsibility toward their brethren, both in their personal behavior and in their solidarity with the human family.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.